If you don't mind me asking, which loans do you typically use for house hacking? 

For example, a buyer putting 20% down on a $500k home would pay around $500k in interest over the 30-year life of a typical mortgage at a rate around 6.5%.

of those I like next door best because it is hard to fake and the reviews are easily tied to a reviewer in your community.The costs of ADUs vary significantly for various reasons including by ground up vs conversion, difficulty with lot (sloes, access, etc), finishes, and even the size (bigger typically have lower PSF).Good luck

While these vendors are typically reputable and skilled, you might not get the best price compared to shopping around directly.

For example, some landlords like newlyweds who will move when she gets pregnant but are otherwise quiet.

While I don’t typically work with real estate agents to find deals, I do collaborate with other professionals throughout the process.

The more properties they get on their marketplace the more money they make so they are basically a glorified MLS because they are marketing themself at a discount to the typical real estate transaction.

Even with the balloon, this is more typical for owner finance. 

Typically, RS3 permits SFHs and two-flats, by right.

What you will find is they typically appraise for far less than the hands off cost to add the ADU.